Drilling and tapping attachment for drill-presses, &amp;c.



Patented Nov. 26, I90|L No. 687,407. W. RUNGE.

DRILLING AND T-APPING ATTACHMENT FOR DRILL PRESSES, u.

(Applicatiun filed Feb. 4, 1901.)

2 SheetsSheat l.

(No Model.)

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w. nuusa. V DRILLING AND TAPP NG ATTACHMENT FDR DRILL PRESSES, 8w.

(Application filed Feb. 4, 1901.)

2 Sheeis-Sheet- 2.

(No Model.)

' yearn wifirzesses m: Norms wzvozs co. PnoTo-uwa, \vAsn UNITED STATES PATENT FFIQE.

WILLIAM Routines SENECA FALLS, NEW YORK, ASSIGNOR TO THE SENECA FALLS MANUFACTURING ooMPANY, or SENECA FALLS,

NEW YORK.

DRILLING AND TAPPING ATTACHMENT rot DRlLL-PRESSES, ac.

S'PECIFICATION forming part of Letters Patent No. ($7,407, dated November 26, 1901. Application filed February 4, 1901. Si'i'aINO- 51 7- (Nb model-l To all whom, it may concern;

Be it known that I, WILLlAM RUN'GE, a citizen of the United States, residing at Seneca Falls, in the county of Seneca and State of New York, have invented new and useful Improvements in Drilling and Tapping Attachments for Drill-Presses and other Machines, of which the following is a specification.

This invention relates to a drilling and tap- IO ping attachment which is more particularly ber'of threads.

designed for drill-presses and similar machines in which the driving-spindle turns constantly in the same direction.

One of the objects ofthis invention is to pro vide a drilling and tapping attachment for machines of "this character which contains a gage mechanism whereby the rotation of the tool-support will be automatically arrested when the same has made a predetermined number of turns and then permits the tool-support to be turned back wardly.

My invention also has the objects to provide means whereby the tool support may be turned constantly in the same direction and to improve the mechanism in other respects.

In the accompanying drawings, consisting of two sheets, Figure 1 is a sectional elevation of my improved drilling and tapping attachment, taken in line 1 1, Fig. 8, showing the position of the parts when the tap or thread-cutting tool begins to cut a thread. Fig. .2 is a sectional elevation of the same in line 2 2, Fig. S,showing the position of the parts when the tap has completed the thread. Fig. 3 is a sectional elevation at right angles to Figs. 2 and 3 in line 3 3, Fig. 8, and showing the position of the parts when the tap begins its backward movement. Fig. t is a fragmentary front View of the attachment, showing the dial whereby the gage mechanism may be set for cutting a predetermined num- Fig. 5 is a fragmentary vertical section in line 5 5, Fig. 1, showing the clutch whereby the tool is turned forwardly. Fig. 6 is a similar section in line 6 6, Fig. 3, showing the clutch whereby the tool is turned backwardly. Figs. 7,8, and 9 are horizontal sections in lines 7 7, 8 8, and 9 9, Fig. 2, respectively. Figs. 10, 11, and 12 are fragmentary vertical sections in lines 10 10, 11 11,

and 12 12, Fig. 8, respectively. Fig. 13 is a detached sectional View of the worm-wheel forming part of the gage mechanism. Fig. 14 is a detached perspective view of the clutch-pawls forming part of the gage mechanism. Fig. 15 is a fragmentary vertical section in line 15 15, Fig. 7. Fig. 16 is a fragmentary sectional elevation of the shipper rod and the parts connected therewith. Fig. 17 is a fragmentary sectional elevation of the return-shaft and the parts connected therewith. Fig. 18 is a horizontal section in line 1818, Fig. 1. Fig. 19 is a fragmentary section similar to Fig. 10, on an enlarged scale, showing the position of the clutch-pawls'when the gage mechanism is not in operation.

Like letters of reference refer to like parts V in the several figures.

A represents the vertical driving-spindle of a drill-press, to the lower end of which my improved drilling and tapping attachment is secured. This spindle is turned constantly forward and is capable of being moved axially upand down by suitable mechanism.

.13 represents the casing orsupporting frame of the drilling and tapping attachment, which is closed at its upper end by a fixed head I) and at its lower end by a removable head I).

0 represents a vertical drivingsleeve which is journaled in a bearing a in the upper head of the casing and which is provided at its upper end with a flange or shoulder 0, bearing against the upper end of the bearing 0. To the upper end of the driving-sleeve is secured a coupling shank or spindle 0 which is detachably secured in a socket a in the lower end of the driving-spindle of the drill-press in the usual manner. The coupling-shank and driving-sleeve are preferably connected by means of an external screw-thread formed on the lower end of the shank and engaging with an internal screw-thread in the upper end of the driving-sleeve, as shown in Figs. 2

E represents a thrust-collar which is. secured by a screw connection to the tool-spindle and against the upper side of which the lower head of the casing is adapted to bear for applying pressure upon the tool during the forward or cutting movement of the same.

The mechanism whereby the forward or operative movement of the tool is produced is constructed as follows:

F represents an intermediate driving friction-disk which is arranged between upper and lower driven friction-disks F The frictional contact between these opposing disks is preferably-increased by interposing facingsf, of fiber, leather, or similar material, between these disks, as shown in Figs. 2 and 3. The upper friction-disk is secured by a screwjoint with the central part of the tool-spindle.

The lower friction-disk is arranged on the upper end of an adjusting-sleeve G, which latter is capable of slidinglengthwise on the toolspindle, but is compelled to turn therewith by a spline or key connection g. The lower end of the adjusting-sleeve G is arranged within the thrust-collar and bears against an upwardlyfacing shoulder e in the collar, as shown in Fig. 2. Upon screwing the thrust-collar up or down on the tool-spindle the lower frictiondisk, which rests by means of the adjustingsleeve on the thrust-collar, is raisedor lowered. By this means the frictional contact between the disks F F F may be varied according to the size of the tool which is used and permits the driving-disk to slip on the driven diskswhen the tool encounters a resistance greater than the tool is capable of withstanding, thereby avoiding breaking of the tool. When a heavy tool is used, the lower frictiondisk is raised, so as to increase the grip between the disks, whereby the forward movement of the tool will only be arrested when the tool encounters considerable resistance-- for instance, when the tool strikes the bottom of the hole in which it is cutting a thread. When a small tool is used, the lower frictiondisk is lowered, so as to reduce the frictional contact between the disks, whereby the rotation of the tool will be arrested when it encounters a comparatively small resistance-- for instance, when striking a hard place in the hole of the article which is being tapped. The thrust-collar is preferably turned for adjusting the friction between the disks and is held in position after adjustment by a worm e, which is journaled transversely on one side of the thrustcollar and meshes with worm-teeth e on the adjacent part of the adjusting-sleeve, as shown in Figs. 2, 3, and 18. One end of the worm projects beyond the outer side of the thrust-collar and is provided with a finger-piece or knob e for turning the same. The worm and worm-teeth not only serve to turn the thrust-collar, but also serve to connect the thrust-collar and adjustingsleeve, so that these parts move up or down together.

H represents an annular flange or rim which projects upwardly from the outer edge of the intermediate friction-disk F, and i is a supporting-ring which is connected by a screwjoint with the upper edge of said flange.

J represents a driven clutch-disk which is mounted loosely on the upper part of the toolspindle between the supporting-ring t and the driving-sleeve O. The under side of the clutch-disk J is provided with one or more recesses j, which receive guide-pins j, projecting upwardly from the supporting-ring 'i, as shown in Fig. 2, whereby the clutch-disk and driving friction-disk are compelled to turn together; but the'clutch-disk is capable of moving axially up and down on the toolspindle independent of the driving frictiondisk. The upward movement of the driven clutch-disk with reference to the driving friction-disk is limited by stops or screws j",

arranged in openings in the driven clutchdisk J and secured at their lower ends to the supporting-ring i, as shown in Fig. 3, while the heads at the upper ends of the screws are adapted to bear against shoulders j in said openings.

K represents a driving clutch disk or wheel which is secured to the lower end of the driving-sleeve O by a screw-joint or otherwise and bears against the lower end of the hearing 0, in which the driving-sleeve is journaled. The under side of the driving clutchdisk is provided with one or. more couplingpins which are adapted to engage with the side of coupling-pins k arranged on the upper side of the driven clutch-disk J. The latter is held yieldingly in an elevated position, so that its pins are engaged by those of the driving clutch-disk,by springs k ,ar'ranged between the bottom of the recesses j in the driven clutch-disk J and the upper ends of the guide-pins j.

During the normal operation of cutting a thread the frame or case bears downward on the thrust-collar E and the clutch-disks J K are coupled, as shown in Figs. 1 and 5, whereby the rotation of the driving-spindle is transmitted successively to the couplingspindle c driving-sleeve 0, upper .c1utch disk K, lower clutch-disk J, supporting-ring '5, driving friction-disk F, driven frictiondisks F F, adj usting-sleeve G, and toolspindle D to the tap d, whereby the latter is turned forward. For the purpose of preventing the casing and the parts mounted thereon from turning with the rotating parts, whereby motion is transmitted from the driving-spindle to the tap, the casing is connected by any suitable means with a stationary part of the drill-press-for instance, by a chain 12 which is connected at one end with the easing and at its other end with the drill-press standard in a well-known manner.

If at any time during the progress of cutting it is desired to stop the operation of the tool, the operator raises the driving-spindle, together with the casing and the parts mounted thereon, whereby the upper or driving clutch-disk K is lifted with its coupling pins it out of engagement from the coupling-pins k of the driven clutch-disk J, thereby arresting the forward movement of the tool.

For the purpose of producing a backward rotation of the tool or tap and causing the same to unscrew itself from the thread which it has cut, a mechanism is provided for reversing the movement of the tap, which is constructed as follows:

L represents a lower clutch gear-wheel, which is mounted loosely on the adjustingsleeve G and journaled in a bearing Z in the lower head of the casing. This wheel is held against axial movement in its bearing by a screw Z, arranged in the side of the hearing I and engaging with a peripheral groove Z in the hub of the clutch-wheel L,as shown in Figs. 1, 2, and 3. The'latter is provided on its upper side with coupling-pins Z which are adapted to be engaged by coupling-pins 1* on the under side of the lower frictiondisk F Z is an upright tubular shaft which is arranged in the side of the casing and journaled on an arbor Z which is secured at its ends to the upper and lower heads of the casing, as shown in Figs. 2 and 17. The hollow shaft is provided at its upper end with a gear pinion Z which meshes with gear-teeth on the periphery of the driving clutch-wheel K, and at its lower end with a gear-pinion Z Z is an intermediate gear-pinion which is journaled ona pin or stud Z secured to the lower head of the casing, and which meshes on one side with the gear-pinion Z on the lower end of the shaft Z and on its opposite side with the lower clutch gear-wheel L, as shown in Figs. '1 and 9. Vhile the drivingspindle is turning forwardly the motion of the latter is transmitted successively from the driving-wheel K to the upper gear-wheel Z shaft 1, and pinions Z l to the lower clutch gear-wheel L, whereby the latter is rotated in a direction opposite to that in which the driving-spindle is rotated. The lower clutchwheel is rotated idly so long as the upper clutch-disks J K are coupled and the tool is moved forward. Upon raising the casin g and the parts connected therewith sufficiently to bring the pins Z of the lower clutch-wheel into engagement with those of the lower friction-disk F, as shown in Figs. 3 and 6, the driving-spindle is coupled with the reversing mechanism. The reverse movement of the lower clutch-wheel L will now be transmitted successively to the lower friction-disk F adjusting-sleeve G, and tool-spindle D to the tap, and the latter will be backed out of the thread which it has out.

In order to permit of automatically stopping the forward movement of the tap after the same orits actuating mechanism has made a predetermined number of turns, an automatic stop or gage mechanism is provided, which is constructed as follows:

M represents an upright shipper-rod, which is arranged in the front part of the casing and guided at its lower end in an opening in the lower head of the casing, while its upper end is guided in a thimble m, which .is secured in the upper head of the casing,as shown in Fig. 16.

m represents a shipper-fork engaging with an annular groove m in the periphery of the driven clutch-disk and provided with an eye m which is screwed on the upper part of theshipper-rod and held in place thereon by a jam-nut m The driven clutch-disk J is free to turn independent of the shipper-fork and rod, but this disk and the fork and rod are compelled to move up and down together. Upon moving the shipper-rod and fork downwardly, together with the driven clutch-disk, until the coupling-pins k of the latter are out of engagement from the coupling-pins 7c of the driving clutch-disk the mechanism whereby the tap is moved forward is disconnected from the driving-spindle and the forward rotation of the tap ceases.

n is a rotating tappet or pin, which is adapted to engage with a trip shoulder or projection on on the shipper-rod. The projection m is arranged on a sleeve m", which is secured on the shipper-rod between the under side of the fork m and a shoulder m on the shipper-rod, as shown in Fig. 16. The tappet n is arranged on the rear side of a tappetwheel N, which is mounted loosely on a horizontal gage-shaft n. The gage-shaft is normally geared by intermediate mechanism with the tap-support, so that this shaft turns forward and backward with the tap. The gearing for this purpose (shown in Figs. 1, 2, 7, and 8) consists of a worm-wheel 0, mounted on the rear part of the gage-shaft and .meshing with a worm 0 on theouter side of the flange H of the driving friction-disk F. The worm-wheel is connected with the gageshaft by a clutch consisting of a couplingpawl 0 which projects through a slot 0 in the gage-shaft and into one of a series of recesses 0 in the bore of the worm -wheel. The coupling-pawl o is pivoted in a recessed shifting rod 0 which slides lengthwise in the hollow rear part of the gage-shaft and pro jects rearwardly througha bearing 0 in the rear side of the casing. Upon moving the shifting rod rearwardly by means of a fingerpiece 0 at its rear end the coupling-pawl is moved outwardly by a spring a so that it engages with the adjacent recess in the bore of the worm-wheel, and therebycouples the latter with the gage-shaft. Upon moving the shifting rod forwardly the coupling-pawl is retracted-or moved inwardly out of engagement with the recess in the worm-wheel by an incline 0 on the pawl engaging with an abutment 0 at the front end of the recess, thereby uncoupling the worm wheel and gageshaft. During the operation of tapping the gage-shaft is coupled with the worm-wheel. The gage-shaft n is also connected with the tappet-wheel by a driving-clutch and a returning-clutch. The driving-clutch at all times compels the tappet-wheel to turn forwardly with the gage-shaft, but permits the latter to turn backwardly without the gageshaft. The returning-clutch compels the tappet-wheel to move backwardly with thegageshaft from the stopping-place to a predetermined starting-place and then permits the gage-shaft to continue its backward movement independently of the tappet-wheel.

The forward driving-clutch of the tappetwheel shown in the drawings, Figs. 8, 1 ,,and 15, consists of a clutch-disk 19, secured to the gage-shaft within the tappet' wheel, which is made hollow for the purpose, clutch-rollersp, arranged in recesses 12*, formed in the periphery of the clutch-disk p, and springs p which tend to move the rollers 19 rearwardly in said recesses, so that they tend to grip against the inclined bottom of the recesses and the bore of the tappet-wheel.

The returning tappet-wheel clutch (shown in Figs. 8, 10, 11, 14, 15 and 19) consists of a clutch-disk Q, secured to the gage-shaft in front of the clutch-diskp and having peripheral notches q. and a return clutch-pawl q, pivoted at one end on the tappet-wheel and provided at its opposite end with a tooth g which is adapted to engage with the notches in the disk Q to couple the latter and the gage-shaft. I

R represents a releasing-finger, whereby the return-pawl is disengaged from the returnv clutch-disk. This fingeris arranged in front of the return-pawl and pivoted on the tappet-wheel concentric with the return-pawl. The free end of the releasing-finger is provided with an inwardly-projecting stop-lug 7,

which is adapted to bear against a circular bearing-face r, formed on the return-disk in front of its notched portion. The return clutch-pawl q" and the releasing-finger R are arranged in a recess r in the side of the tappet=wheel and are yieldingly pressed inwardly into their operative position by a spring r secured to the tappet wheel and bearing against the outer side of the pawls. If desired, the return-pawl and releasing-finger may be made in one piece; but for convenience in manufacturing the same are made separate and are coupled by a pin or projection 8 on the return-pawl projecting into recesses s in the outer side of the releasing-finger,whereby the latter when moved outwardly causes the return-pawl to be also moved outwardly.

T represents a dial or adjusting-head forming part of the gage mechanism, whereby the number of. rotations of the tap is controlled. This dial is capable of rotary adjustment in an opening formed in the front side of the casing concentric with the gage-shaft and is provided centrally with a bearing 25, in which the front end of the gage-shaft is journaled. The margin of the dial is provided with suitable graduations u, which cooperate with a mark a on the casing, whereby the position inclines across the of the dial with reference to the other parts of the adjusting mechanism may be determined. The dial is secured to the casing and is also held in its adjusted position by means of a set-screw 1), arranged in the casing and engaging with a peripheral grooveo in the dial, as shown in Figs. 4, 7, 11, and 15. The rear side of the dial is provided with a gage pin or stop w, which projects into the path of the releasing-finger R. WVhen the releasin g-finger and return-pawl are free and moved into their inner position, the releasing-finger path of the gage-pin, as shown in Fig. 10.

In the rearmost position of the tappetwheel the releasing-finger R engages with its inner side against the outer side of the gagepin'w and the rear side of the stop-lug r engages against the front side of the gage-pin, whereby the tappet wheel is held against backward movement with reference to the gage-shaft and the releasing-finger and re= turn-pawl are moved outwardly, so that the latter is out of engagement from the clutchdisk Q. The parts remain in this position andthe gage shaft is turned backwardly idly independent of the tappet-wheel so long as the casing is raised and the tap-actuating mechanism is connected by the reversinggearing with the driving-spindle by reason of the coupling of the lower friction disk F and the reversing clutch-wheel L.

When the operator lowers the driving-spindle and the parts connected therewith until the tap bears against the article to be threaded and then continues to lower the drivingspindle and casing until the upper clutch or driving-wheel K is coupled with the lower clutch-disk J, as shown in Fig. 1, the tap commences to turn forward and cuts a thread in the article against which it bears and the gage-shaft is also turned forwardly. The instant the gage-shaft begins its forward movement the rollers 19 of the driving-clutch grip against the inner side of the tappet-Wheel andturn the latter forward with the gageshaft. During the initial portion of this forward movement of the tappet-wheel the releasing-finger R is moved off from the gagepin to and permits the spring'r to move the releasing-finger R and return-pawl. q inwardly on top of the reversing clutch-wheel Q and the Whole gage mechanism 'moves forward as one until the tap or its support has made the predetermined number of rotations for which the gage mechanism has been set. During the last part of the forward movement of the tappet-wheel its tappet n is carried downwardly against the upper side of the trip-lug m and moves the shipper-rod and clutch-disk J downwardlysufficiently to disengage the pins 10 of the latter from the pins of the driving clutch-wheel K, as represented in Fig. 2, whereby the forward movement of the tap and tappet-wheel is arrested. The operator now raises the driving-spindle and the casing connected therewith, whereby the coupling-pins Z of the lower clutch-wheel L are engaged with the coupling-pins Z of the lower friction-disk F as shown in Figs. 3 and 6, thereby connecting the tap at its support through the medium of the reversing-gearing with the driving-spindle and causing the tap and the gage-shaft to turn backwardly. Du ring the backward movement of the gage-shaft the rollers 13' of the tappet-driving clutch do not grip the tappet-wheel, but the latter is coupled with the gage-shaft by the returnpawl g on the tappet -wheel engaging with the notched returning clutch-disk Q on the gage-shaft,whereby the tappet-wheel is turned backwardly with the gage-shaft. The tappetwheel moves backwardly with the gage-shaft until the releasing-finger R of the tappetwheel engages with the stationary gage-pin w of the dial and is moved outwardly by the latter sufficiently to disengage its companion return-pawl g from the return clutch-disk Q, as shown in Fig. 19. When this takes place, the tappet-wheel is uncoupled from the gageshaft and stands still, while the gage-shaft continues to move idly backward until the operator again manipulates the apparatus for tapping the next hole.

The frictional contact between the gageshaft and the tappet-wheel is prevented from moving the latter backwardly with the gageshaft by the rear side of the stop-lug r engaging with the front side of the gage-pin.

The number of forward turns which the tap or its support makes before its forward movement is arrested depends upon the position of the gage-pin to with reference to the trip-lug of the shipper-rod, which is the stopping-place of the tappet-wheel. The tappet- Wheel always moves forward from the gagepin as a starting-place until its releasing-tappet uncouples the tool-support from the forward drivingmechanism and then in oves backwardly against the gage-pin. TV hen the dial is adjusted so that its gage-pin is near to the stopping-place of the tappet-wheel,the tap and its support will make only a few forward turns before being arrested, whereas if the gagepin is moved farther away from the stoppingplace of the tappetwheel the tap will be turned a correspondingly greater number of times before arrested in its forward movement.

If the tap should be arrested before completing its forward movement bystriking the bottom of the hole which is being threaded or by striking a hard spot in said hole, the

driving'disk F would continue its forward movement independent of the tap and its support by slipping of the frictional connection between these parts. The driving-disk F continues to move forward after the tool has been so arrested and operates the tappet wheel until the latter has been turned forward the extent for which it was set and then uncouples the clutch-wheel K and disk J and stops the operation of the gage mechanism.

The graduat-ions on the dial are arranged according to the relative position of the gagepin to the other parts of the gage mechan- V ism, so that the operator can readily set the apparatus for obtaining the required number of turns of the tap and a corresponding number of threads.

When it is desired to substitute a drill for boring a hole in place of the screw-thread cutter or tap, the shifting rod 0 is moved forwardly, so as to uncouple the worm-wheel 0 from the gage-shaft, whereby the gage mechanism is thrown outof gear. The dialis then turned so that its gage-pin w engages against the front side of the lug r of the releasingfinger. The tappet-wheel is now caused to move backwardly with the dial until the tappet engages against the under side of the trip-lug m and holds the shipper-rod and the driven clutch-disk J up, so that the couplingpins of the latter are engaged by the coupling-pins of the driving clutch-wheel K. Upon tightening the set-screw 2* against the dial while the parts are in this position the clutch-wheel K and the clutch-disk J are locked in a coupled position and the drill which is attached to the holder or support is turned constantly forward.

Although I have shown in y improved drilling and tapping attachment applied to a drillpress having a vertical driving-spindle, it is applicable to drill-presses having horizontal driving-spindles and other kinds of machines.

I claim as my invention 1. The combination with a driving-spindle and a tool-spindle, of cooperating frictiondisks arranged between the driving spindle and the tool spindle, an adjusting -sleeve movable lengthwise on one of said spindles and connected with one of said friction-disks, a collar bearin g against the adjusting-sleeve and having a screw connection with the spindle on which the sleeve is mounted, and a worm journaled on said collar and meshing with worm-teeth on the adj listing-sleeve, substantially as set forth.

2. The combination with a driving-spindle and a toolspindle, of a driving friction-disk connected with the-driving-spindle, upper and lower driven friction-disks engaging with opposite sides of the driving-disk, one of said driven disks being secured to the tool-spindle, an adjusting-sleeve splined on the toolspindle and connected with the other driven disk, a collar having a screw connection with the tool-spindle, and bearing against the adjusting-sleeve, and an adjusting-worm journaled in said collar and meshing with wormteeth on the adjusting-sleeve, substantially as set forth.

3. The combination with a driving-wheel, and a tool-spindle, of a driving friction-disk, an upper driven friction-disk bearing against the. upper side of the driving-disk and connected with the tool-spindle, a lower driven friction-disk bearing against the under side of the driving-disk, an adjusting-sleeve splined on the tool-spindle and connected at tool-spindle is moved forwardly, a reversing-1 gearing which is arranged between the dllV- ing-wheel and the tool-spindle and whereby the latter is moved backwardly, and a clutch whereby said reversing-gearing may be ren dered efiective or ineffective, substantially as set forth.

4:. The combination with a driving device,-

a tool-support, and a clutch whereby the driving device and tool-support are connected and disconnected, of a gage mechanism controlled by the rotation of the tool-support and which controls the movement of said support independent of the position of the work, substantially as set forth.

5. The combinationwith a driving-wheel provided with coupling-pins and a tool-spindle, of a clutch-disk which is connected with the tool-spindle so as to turn therewith but is capable of sliding lengthwise thereon and which is provided with con pling-pins adapted to engage the coupling-pins of the drivingwheel, a shipper-rod provided with a for]: which engages with a peripheral groove in the clutch-disk, and a gage mechanism which is geared with the tool-spindle and which shifts the shipper-rod, substantially as set forth.

6. The combination with a driving-wheel provided with coupling-pins, and a tool-spindle, of a driving friction-disk provided with guide-pins, driven friction-disks connected with the tool-spindle and bearing against 0pposite sides of the driving-disk, a clutch-disk sliding on said guide-pins and provided with coupling-pins adapted to engage with the coupling-pins of the driving-wheel, springs arranged between the guide-pins and the clutch-disk, a shipper-rod provided with a fork which engages with a peripheral groove in the clutch-disk, and a gage mechanism which is geared with the tool-spindle and which shifts said shipper-rod and the parts connected therewith, substantially as set forth.

7. The combination with a driving-wheel provided with coupling-pins, and a tool-spin- I dle, of a driving friction-disk provided with guide-pins, driven friction-disks connected with the tool-spindle and bearing against op- 1 posite sides of the driving-disk, a clutch-disk gage mechanism which is geared with the toolspindle and which shifts said shipper-rod and the parts connected therewith, substantially as set forth.

S. v The combination with a drivingdevice, a tool -suppor.t, and a clutch whereby the driving device and tool-support are connected and disconnected, of a gage-shaft which is geared with said tool-support so as to move therewith, and a shipping device which is actuated by. said-gage-shaft and which shifts said clutch, substantially as set forth.

9. The combination with a driving-wheel, a tool-support, and a clutch whereby the driving device and tool-support are connected and disconnected, of a shipper-rod whereby said clutch is operated and which is provided with a trip-shoulder, a tappet-wheel provided with a tappet which is adapted to engage with said trip-shoulder and shift the shipperrod, a gage-shaft connected with the tappet-wheel, and gearing connecting the gage-shaft with the tool-support, substantially as set forth.

1 0. The combination with a driving-wheel, a tool-support, and a clutch whereby the driving device and tool-support are connected and disconnected, of a shipper-rod whereby said clutch is operated and which is provided with a trip-shoulder, a tappetwheel provided with a tappet which is adapted to engage with a trip-shoulder of the shipper-rod and shift the same, a gage-shaft which is geared with the tool-support, a forward driving-clutch which causes the tappet-wheel to turn forwardly with the gage-shaft, a return -clutch which causes the tappetwheel to turn backwardly with the gage-shaft, and a stop or gage which controls the operation of the return-clutch, substantially as set forth.

11. The combination with adriving device, a tool-support, and a clutch whereby the driving device and tool-support are connected and disconnected, of a shipper-rod whereby said clutch is operated and which is provided with a trip-shoulder, a tappet-wheel provided with a tappet which is adapted to engage with said trip-shoulder and shift the shipper-rod, a gage-shaft which is geared with the tool-support, a forward driving-clutch which causes the tappet-wheel to turn forwardly with the gage-shaft, a return-clutch which causes the tappet-wheel to turn, backwardly with the gage-shaft, and an adjusting-dial provided with a gage-pin which controls the operation of the return-clutch,subs tantiall y as set forth.

12. The combination with a driving-spindle, a tool-support and a driving-clutch whereby the driving-spindle and tool-spindle are connected and disconnected, of a shipper-rod whereby said driving-clutch is operated and which is provided with a trip-shoulder, a tappet-wheel provided with a tappet which engages with said trip-shoulder, a gage-shaft which supports the tappet-wheel and which is geared with the tool-spindle, a forward driving-clutch which causes the tappet-wheel to turn forwardly with the gage-shaft and which consists of a clutch-disk secured to the gage-shaft within the tappet-wheel and rollers which engage with inclines on the clutch-disk and with the bore of the tappetwheel, a returning-clutch which causes the tappet-wheel to turn backwardly with the gage-shaft and which consists of a clutchdisk secured to the gage-shaft and provided with peripheral notches and a pawl pivoted on the tappet-wheel and engaging with said peripheral notches, areleasing-finger connected with said pawl and provided with a stop, and a dial which is adjustable circumferentially with reference to the gage-shaft and which is provided with a gage-pin adapted to engage with said finger for lifting said pawl out of the notched disk and to engage said stop for arresting the rotation of the tappet-wheel, substantially as set forth.

13. The combination with a driving device, a tool-support, and a driving-clutch whereby the driving device and tool-support may be connected and disconnected, of a gage mechanism which is geared with the tool-support and which controls said driving-clutch, and

a clutch whereby the gage mechanism may be rendered effective and ineffective, substantially as set forth.

14. The combination with a driving device, a tool-support, and a driving-clutch whereby the driving device and tool-support may be connected and disconnected, of a gage mechanism which controls said driving-clutch and which is provided with a gage-shaft, a wormwheel mounted on said shaft and meshing with a worm which moves with the tool-sup port, and a clutch which connects and disconnects the gage-shaft and the wormwheel, substantially as set forth.

15. The combination with a driving device, a tool-support, and a driving-clutch whereby the driving device and tool-support may be connected-and disconnected, of a gage mechanism which controls said driving-clutch and which is provided with a gage-shaft, a wormwheel mounted on said shaft and meshing with a worm which'moves with the tool-support, a shifting rod sliding in the gage-shaft, and a pawl mounted on the shifting rod and projecting through a slot in the gage-shaft into a recess in the bore of the worm-wheel, substantially as set forth.

16. The combination with a driving device, a tool-support, and a driving-clutch whereby the driving device and tool-support may be connected and disconnected, of a gage mechanism which controls said driving-clutch and which is provided with a gage-shaft, a wormwheel mounted on said shaft and meshing with a Worm which moves with the tool-support, a shifting rod sliding in the gage-shaft, a pawl which is pivoted on said rod and which is pushed outwardly by aspring through a slot in the gage-shaft and into engagement with a recess in the bore of the worm-wheel, and an abutment which is arranged at the end of said recess and which retractssaid pawl from said recess by engaging with an incline on the pawl, substantially as set forth.

17. The combination with a driving-wheel and a tool-spindle, of a driving friction-disk, two driven friction-disks connected with the tool spindle and bearing against opposite sides of the driving friction-disk, an annular flange projecting upwardly from the driving friction-disk, a supporting-ring secured to said flange and provided with guide-pins, a clutch-disk provided with openings which receive said guide-pins and with coupling-pins which are adapted to engage with couplingpins on the driving-wheel, springs interposed between said guide-pins and the clutch-disk,

stop-screws which are connected with said supporting-ring and are adapted to engage with shoulders on the clutch-disk, a shipperrod connected with said cln tch-disk, a tappetwheel provided with a tappet adapted to shift said shipper-rod, a gage-shaft connected with the tappet-wheel, and a worm-wheel mounted on the gage-shaft and meshing with a worm on the flange of the driving frictiondisk, substantially as set forth.

18. In combination a tool-holder, a driving device, interposed clutch mechanism for rotating the former from the latter, and means for automatically throwing out said clutch independent of the axial movement of the holder relative to the driving device, substantially as set forth.

19. In combination a tool-spindle,a friction disk carried thereby, a driVingspindle, a second friction-disk driven therefrom arranged in contact with and designed to drive the first disk, and clutch mechanism interposed between the driving-spindle and the second disk, substantially as set forth.

20. In combination a driving device, a toolspindle, frictional driving mechanism interposed between the same, means for varying the frictional engagement of the members comprising said mechanism, and reversing mechanism interposed between the driving mechanism and said tool-spindle and operating independently of said means for varying the frictional engagement, substantially as set forth.

21. In combination a driving-spindle,a toolspindle, means including a frictional disk interposed between said driving-spindle and tool-spindle for rotating the latter from the former, and gage mechanism operated from said disk, substantially as set forth.

22. In combination a driving-spindle, a toolholder, interposed clutch mechanism, a shipper for throwing out said clutch, and an oscillating device located to one side and supported independently of the drive -spindle with means for operating the same for actuating said shipper, substantially as set forth.

23. In combination a driving-spindle, a toolholder, interposed clutch mechanism, a shipper for throwing out said clutch, an oscillating device for actuating the shipper timed to IIO move in a predetermined relation to the rotation of said tool-holder and in unison therewith, said device actuating the shipper at the end of its stroke and means for varying the length of said stroke, substantially as set forth.

24:. In combination a driving device,a toolholder, interposed clutch mechanism for retating the latter from the former, a shipper for throwing said clutch out, a device for operating the same, means for moving the lat ter during the rotation of the tool-holder,said movement being independent of the axial feed of the tool-holder, said device operating said shipper at a fixed point in its movement, and means for varying the distance between said fixed point and the point of starting of said device, whereby the time required for the device to travel from the starting position to the shipper may be varied, substaning a clutch also interposed between the driving device and tool-holder, means for throwing out the first clutch including a controlling device having an oscillating movement with 'a variable stroke, said device operating to WILLIAM RUNGE.

Witnesses:

CHARLES F. HAMMOND, ADELBERT S. DAVIS. 

